Galvanic brush



B. H. ROBE. Galvanic-Brush.

Patnted Mar. 23, 1880.

NJETERS. PHOTO-UTNDGRAPHEH. WISHINGTON. D O. h

UNITED STATES PATENT OFFICE.

BYRON H. ROBB, OF NEWPORT, KENTUCKY.

GALVANIC BRUSH.

SPECIFICATION forming part of Letters Patent No. 225,723, dated March 23, 1880.

Application filed January 526, 1880.

To all whom it may concern:

Be it known that I, BYRON H. ROBB, of the city of Newport, in the county of Campbell and State of Kentucky, have invented a new and useful Improvement in Galvanic Brushes, of which the following is a specification.

This invention relates to galvanic brushes, and is an improvement upon the invention for which Letters PatentNo.22l,612 were granted to me November 11, 1879.

The objects of these improvements are to lessen the cost of construction, to make the brush more convenient to use and more comely in appearance, and at the same time to provide for the use of a more powerful battery without making the brush unhandy and cumbersome.

In the accompanying drawings, in which similar letters of reference indicate the same parts in both figures, Figure 1 is aperspective view 'of my improved brush, and Fig. 2 is a longitudinal vertical section thereof.

A is the back or stock of the brush, which is fitted with a pin-retaining facing of the usual kind now in use. Through the back of the brush is cut an oblong opening to receive a galvanic or voltaic pile. The opening in the back is covered by a similarlyshaped metal box, B, which box has an outwardly-projecting flange, 0, that rests upon the back A. The box is secured upon the back A by pins (Z d and buttons c e. The sides of the opening in the back and the rim of coverB are lined with a rubber ring, f, to isolate the voltaic pile from the back and cover.

G is a metal spring, secured at one end to the top of the handle. It is arched up over cover B, and has its free end bent down and passed through an opening in the top of cover B, where it remains in proximity to the top plate of the pile within, against which plate it is to be pressed by the forefinger to complete the circuit when the brush is used. The opposite plate of the pile rests upon the pinheads on thcinside of thepiirretaining facing.

Should a stronger current be required a wire from a battery may be secured to the spring G, which is perforated to receive it, its operation in this respect being the same as the hinding-post shown in my former patent, the advantage of the spring G being that by its use I am enabled to confine all the plates of the pile within the cavity of the brush, and insure a perfect closing of the circuit, whatever number of plates are used in the pile.

By my present improvements I am enabled to make the stock of my brush light, and at the same time obtain a battery of any desired number of plates, by increasing or lessening the depth of thelightlnetal cover-B. The pile is also, by the rubber linings f f, entirely isolated from the brush.

I claim 1. The back A, havinga pin-retaining facing, and recessed to receive a voltaic pile, in combination with the inverted flanged box B, adapted to fit over the recess in back A, and secured to said back by pins (1 and buttons 6, substantially as specified.

2. The combination, substantially as specified, of the back A, a piirretaining facing, the inverted box-cover B, and the binding-spring G with a voltaic pile incased within said back and cover.

3. The combination, substantially as specified, of the recessed back A and recessed cover B with the rubber linings ff and a voltaic pile, for the purpose set forth.

BYRON H. ROBB.

Witnesses:

F. M. Roo'rs, Geo. J. MURRAY. 

